Dump-truck hoisting mechanism



April 21, 1925.

P. E. BARKER DUMP TRUCK HOISTINGMECHANISM F ile d Au g. 27, 1921 6 Sheets-Sheet 1 April 21, 1925. v P. E. BARKER DUMP TRUCK HOISTING MECHANISM Filed Aug. 2?, 1921 6 Sheets-Sheet '2 April 21, 1925.

6 Sheets-Sheet 3 P. E. BARKER DUMP TRUCK HOISTING MECHANISM Filed Aug. 27,

67 VENTOR 3 y I Z April 21, 1925. 1,534,294

P. E- BARKER V DUMP TRUCK HOISTING MECHANISM 6 Sheets-Shee't 4 Filed Aug. 27 1921 April 21, 1925. 7 1,534,294

P. E. BARKER I DUMP TRUCK HOISTING MECHANISM Filed Aug. 27, 1921 6 Sheets-Sheet 5 in? Q am #7 April 2 1, 1925. 1,534,294

' P. E. BARKER DUMP TRUCK HOIS'IING MECHANISM v Filed Aug. 2'7, 1921 6 'Sheets$heet 6 @999. 15' 96 1 J92 '11 .292 IL y %Ww To "all whom it wmyvonpeimtf 7 [Be it known thet lg- Pent)? ELQBennEn, .a. 1 citizen of: the United States, residing lat Cleveland, in the county of. Quyahogie and *5 Steteyof .Ohio lhave invented certain new anduseful, Improvements in .DuinpTruck Hoisting Mechanism, of whieh the follewingis mspejcifieatioil.

This invention relatesto improvements in (li loistorldu nptrucks. j i r y J I Tl1e';ob,"eet of thisinvention is toprovicle an improved hoistin mechanism for etruck -bocly in which thecebiles and sheaves form ing' a part of such mechanism will maintain 15ieifeetive hdistingrelation with the truck] preeticelly the entire lex" body throughout ,tentiof the cables. Other objects of-this invention will be ap palle nt frolnthe following description and zfi cleiins whenConsidered together with the peecoinpenying drawings Fig.1'ise side elevetion'oi? my ilnproved .clnmptrul;hoisting ineehanism; Fi'g. 2; is a 1 deteilwiew of the drive connection t the hoisting niechenisrnpFig. 3 is adet'ztil View} er theone-way clutch to the hoistingmeeha- .nisin Fig. {tie a detail Viewotf the hoisting 'lnecliehisrn"; Fig. 5 is taken on linej5 5, Fig.j 4 and shows al'atch forvthe lever redgjF 36 is a detail elewf'atien ofthefhoisting' ineehaw nism -in generel'yFig. 'Z'visYztIicletail elevetion' oftheslheaye frame; Fig.8,.vsection taken on. line 8-43 of Fig. 4. Fig. ;9 is e section on line 9+9 of Fig; 4 Fig. 10 is 'a detail View of.tlieoil velve; F ig. llgisa section oniline 'll--Itot- Fig; etjFig. .12isan felevation of' the clog;-Fig..13 shewsin plan the notch which is engaged by the dog Fig. ljiis -a. detail iew of the trip button on the heisting I n) nut ;1Fig. L'i'ise front elevation of the sheave operating lever mechanism in hoisted position; and. Fig. 16 is a. detail View of theeastl metal frame ferithe sheaves. 5 J In, tl1edevieees.here showl'ljgaisfengin'I. as xisilel is inounterl on the front endqof the;

the gearing enclosed in tliefeasi-ng .3Ywith "the shaft and" the aligned shaft 4' which ex tendsreerwercllyto the rear axle; The gear enelosedin the easing 3: ineludes the coin binetions ior lrliggl'ig 10w, anclintermediate, speeds as well as fer reverse drive. The truck .boclys 5' which ,is pivotally n iofinted; at at thereer endioi theehessis is adeptedfto, P5 be rwisedg and: lewereelby meensoiz' the eebles.

be leter clesoribed.; fl 1 elijessis 2 and "has; drive connection through;

TE .Frre

DUMP-TRUCK i-ro srme MEGIHQANISM.

of mechanism opereted The transmission easing 12 encloses ay elnteh meinber 13 whicliiskeyeirl upon sheit't' zin clfis edapted ipon ectuetion ofthe OPBIF a tlng shaft liconnected to yoke 14% to be 1343313 3;@E dLEVELAND, ei iiotgtssieliiontroTHEVAN ne m me-ems V ;ooMPhN-Y, OFGLEVELAND; onro, A .GORPQRA'IIQN 'O'F"OEHKO.

I 7 attechecli et 8 to the low er ends of the chem nelbersfi) on the frent enclof the it triiek bo cl-yend attached at theirfother ends to the angle iron on 1 the chassis. The hoisting 'L movement isefi'ectecl by means oft-he sheaves 11 whiehere projected iipwerdly means t thrown into engagement with the coinpanion c1uteh.me1nber 1 5 festnpon the drive shaft 41 ifor clriving operation. of the truck. The

Cll2ti(3hl11:1(* mb6f .13 ceirelso be. shiftedfori wa.rdly" for engagement with the companion clutch member lfizwhich is loosely mounted; V

uponthe shaft end which carries a sprocket, 17 This sprocket bymeenslof the chain .18

t has driving eonnection with i the smaller sprocket19 which is loosely mounted iipon and has oneway-felutcliconnection with thef shaft 20. T hisione my clutch; connection comprises the.inelinediancl toothed surface r M of the-sprocket member 19? foxffcliivihgponl I i neetiioni with" the; correspondingly formed suriacejon the companion clutch member 21 which-is slidably m onntecl' upon theshaft 20. i i i An ennnlergshoulder"221s provided 1 10111 one end; of the clutch member Qlfencl forms the spring 23 egainst the pin 25} which ex tends throlighjthe end portion ofthe shaft--20 a'n aibiitmentfor one enql of the spiral spring i 23 whieh'ebuts at its other .end'egainst the V ennulerringfit, The ringffl l is foreeclgbyf and also through the clia netrioellydisposed 7 member Thus a positive drive iseifee efieetecl when the sproeketlflis operated in one directiononly,"tha.t is iwl'ien the engine; 1s,; set ifor director forward clrlye. .When,

however; the geeis; are "shifted; for i'ei erse I drive ofthe truclgthe inelirrecl'or ciilmiaees of theecl-Litch Ineinbeeearriecl by the sprocket 519 will slip past thetam faces of the cltiteh nien b'er land muse a movementof ithe --eh1tchi 1nember 21 along the shaft 20 against the-tension of the'spring 23, which straight linemovement is permitted by the slot and Ji-1jrerrengement et the outer pends ofthe shaft and clutch member 21. Thus when the truck is in reverse drive, no motion will be transmitted through the clutch to the shaft 20. Other forms of one-way clutches may be used at this point.

The sprocket 19 and the chain 18 are enclosed in the casing which is bolted upon the top of the transmission casing 12. The shaft 20, as it extends to the right of the sprocket 19, as viewed in Fig 3, is given suitable support in the tubular bearing 31 which is attached by means of the bolts 32 to the side of the cast metal base 33 of the casing 34 which encloses the nut and screw mechanism for raising and lowering the truck body. A bushing 33 provided and the shaft 20 is given positive driving connection with the stub shaft 341- by means of the screw threaded connection 35 and the lock pin 36. The bushing 37 is also pro vided and a space 38 is preserved at this point between the bearing 31 and the shaft 20. it-h this arrangement I am enabled to attach my hoisting mechanism including the one way clutch connection to a standard mechanism for raising and lowering the truck body. In this particular instance the only parts necessary for such drive connection are the tubular supporting member with its bushings and the connection just now described between the shaft 20 and the stub shaft 84-.

The cast metal base 33 is supported upon the chassis in any suitable manner as for instance by the screw bolts a0 and is en gaged by the brace rods 41 which engage at their upper ends ears provided upon the cast metal top portion 41:3. The casing 34; is secured within the cast metal base by means of the bolts a1 and is secured by means of the bolts 4-2 at its upper end to the cast metal top portion 43 which is formed at one side with a housing for enclosing the connection between the operating handle 45 and the upwardly extending operating rod 46. As seen in. the drawings, the base and easing are inclined slightly to the rear. The handle is fast upon the shaft 47 which is mounted in the top portion 43. A yoke member 50 is also rigidly mounted upon the shaft 47 by means of set screw 51 extending through the opposite shoulder of the yoke member 50 and engaging the shaft 47. The oppositely disposed arms oi the yoke memberfitl terminate at points on diametrically opposed sides of the screw shaft 54, while the rearwardly extending portion 55 of the yoke member terminates in a ball shaped portion which is adapted for swivel connection in the socket 56 of the upwardly extending rod 46. A clevis 60, screw threaded on rod 4L6 has pivotal connection with the rod 61 which extends through the tubular guide portion 62 formed on the cast metal base The lower end of the rod 61 is connected at 63 with the yoke 64 which is adapted for operative engagement with the annular groove 65 of the ii'itermediate clutch member 65. This clutch member 65 is keyed, as indicated at 65', upon the lower plain end portion of the screw shaft 54.- and is adapted for drive connection with either the upper or lower bevel gears 66 and 67, respectively, which are freely mounted with the intermediate bushings upon the screw shaft 54. These bevel gears are suitably mounted by means of screw bolts upon the annular flanges 66 of hubs 66" which surround the screw shaft with intermediate bushings and are supported in such position by means of the thrust collars 66 and (36. The stub shaft Ell has fixedly mounted upon its other end the intermediate bevel pinion which meshes with both the upper and lower bevel gears (36 and (37. Thus it will be seen that upon operation of the shaft B l both of the bevel gears 66 and 67 will be operated in opposite directions, but no motion of the screw shaft 54 will be caused unless the clutch member is moved upwardly or downwardly into clutched engagement with gear (56 or 67.

The present structure is so arranged that upon movement of the handle 45 to the right, as viewed in the drawings, the operating rod 46 will be moved upwardly which means that the intermediate clutch member will be brought into driving connection with the upper bevel gear 66. The screw shaft is then operated for upward movement of the truck body by means of the nut which will brcaused to move upwardly along the screw shaft, The nut 90 is prevented from rotating by means of the key 91 secured in any suitable manner as by riveting along the inner face of the casing 34. Rigidly mounted upon the nut 90 by means of the pin and slot connection 93 is the plunger 94 whi h at its upper end has swiveling connection with the cast metal support 95 for cross head 96. The connection at 93 is a rigid one by virtue of the fact that the companion semi circular grooves in the nut and plunger one tend only tangentially and thus prevent any relative movement betwecn these two parts. whereas the pin and slot connection between the upper member 95 and the plunger 04; allows a sm'ivelling movement between these two parts because of the fact that the groove in the cast member extends completely thereabout with a straight pin engaging taugnuu tially in only a portion of the groove. Thus the force of a blow striking the cr head will not be transmitted to the mechanism at the lower end. of the plungei: head 96 has attached thereto the upper ends of rods which extend outwardly and downwardly for pivotal. connection with the cars 96" on the cast metal frai'ne comprising the urine 96" for the sheaves. The sheaves 11 are mounted in the upper ends of The cross 1 ends with e transversely extending portion 96 fl'yTl1lCl1 is cnrveclebontthecasing. I The times entlnpon raising the ci'oss heael they will 11(1e&l011g the-seine, the sheave iranie tn-mung upon its point of pivotal "connection 1 rectilineen path. Theflsheavesnre directed forward ends to the 'eei'we clly extending on theYcasting. J The channel jbei's 9,

wz ti'dlyl from theperpendicular,es at 9*,121113 ncllnecli earwardly at aft 9 tQlVilL'dS,,gth 321111113 perpendlculzn' and terminate at them hotto ii f the trnolcflfralne, as indicated on the chewing i Theupperlcast neinherflii is provided at f its extreme upper portion with an 01116391 -voir 100 closecl bye snitabl-egsei'ewCap 101, this oilfichen bey having extending there wl ichiextencls the supporting "pintl 03 for igoitionflf the cest inetel n e nbei 95 is-pr0- web 106,Whichdefineslthe'bottoni offthe oil by means of sci'ew threaded engagement the ll0lyconioal seats-ere provided for these twouvalves and at springlfl normally-holds thelowei valve 110 in open positioniwith the nppfelp valve closed. The spring lll ,ve-lve 110 has hearing engagement at its (Portion 113 foi the pin 108 and terminating in the web 114. Afpin; 120: is sea-tedflwithin is normally forced} upwardly by mleensj of I thzit when the: 01'

Trespectively. *Then-iipon aising: theftfnok sheaves sea-t lIlllhQ channel hers 9 at all" iwith i ocls 96 whieh are projecteddong it along; a, cnivectpeth' by: means of the rods 96? pivotally mounted! on the axis of the lower ends at a point somewhat below the the c oss head 96. Cotter pins 104niaintain" the crosspin in proper position. The lower vided with the ztnnnlair inwardly extending 1 reservoir 100,. \This web has seated therein vzth e casing. 107 within n rhioh jjl'ilp lllltetlthe valve stem 1G8carryingetgtsnpper end the valve 109 and at itsglower endf the valve thrust collars.

Whieli-xi-lmts' etitslower endegainstthe Lnppef fend against the web/112 fixecl within ,the velvecztsing and extenclijnges a guiding" the upper -en"clfpo1'tionof the screw shaft and 1 the spiral spring 121 whichhas fsiiitehle itljlltlllfllll] M77122 at itslowelyend. ;A s1nitajhle'stop is provicledet for;theishon lder 126 formed upon tln-wpin 120'so estolimit Vitsnpper movement.- Thus it "will ghe seen 5 head and likewise 1 the f Ytr tick "body al-re inextreme lowered: position thexr-alvewllfi will]strikethePinflZOgfand valve 109 to close and thevalve 110 to open.

Valve casing down through the plung'ei 94 p estjjthe guide sleeve 113Qencl to the top of the nnt 90 which is provided with poitsj132 for passage of the oil'therethrough; These ports communicate at then: lowe ends with the chamber} 133 within which. are enclosed wicks 134 extending; outthrongh the side of I the plunger 90'. which fonthe main plant are inclined ont- The oihwhich will work 94 and onto the lowet portion ofthe nut upward iinoi ementlof the cross Qheed, the Vel-Ve110"will leave the rocll and the tensionjof spring 111 will cause the 7 which it then "pessesencl "finally reaches the i gearing in the-lower portion of the casing; 1 The oil'eventnally settlesin' the base cover 1.40 which is removwhly secured to the cast "metal base by means of thebolts 141.

The extrenielowe r end of the castemetel base. encloses also thethi ust hearings 142 M a-n cl'143fo1- the lowerend of the-screw shaft.

through a tubular portion 102 through As will "he ,epparent;' the thrust collar 142 will take up'longitndinalor i erticaltln'nst whilethe lowenthitnst collar will take up transverse thrust nponthis enclcof the screw shaft. Thethrnst Collar 142 is keyed as inproiritleclfwith' e notch 150" formed in the nppenface of this collar. f This notch 150 is adapted. for engagementfhy the dog 1155' jwhich"is pivot-ally"inonntetl Lhy nieans of e i pin nli'on the flangecl strap 156 wl1ich in turn 1 iSfsecn-recl nieane of bolts to "the lower Jpoi'tion olflthe bevel gear 67. A cotter pin 170 (secures the pin which-extends through body; by gi'a-vity while the truck isjin mo:

inflockedposition after heingsci'ew thread? i L t ed upon the extfemeloweifencl"of the shaft indicated at 147. ,Snitahle washers 148 and loallbearingsf149 are provided for the The upper "thrust collai" is h tioni Aswill he sewn-om the drawings,

any tendency of the net 9.0 to work itswey elownwztpclly end to thereby-cause a turning movement of the screw ehniit will ezinsethe dog lliOi'to engage the wallntthe end 01: the

notchflindl pifeventfwwliat would: otl-lerwise igesu lt-in the turning jo'f'thesc1'ew anti-lower ingotthetinckiho tly. Snch a locking ofthe fperts'ngainst such movement is made posse new my device hecenseof the factthet the mecliienical driving connection between the thfnst, coll-e1: 142 onthe shaft 54 through the bevel ,qears ishefts 34 and 2 0 to ,the

sprocket wheels 19 end constitutes *s'ufiiclentload to prevent turning of the screw" the registering apeitniesfin the depending 1 flanges oft-lie strap and clog. The oh-f jectofthisdog and] notch construction is to 1)1'610115 accidental settling? of the truck shaft. Relative movement in the opposite direction is permitted between collar 142 and gear 67 since the pivoted dog will ride. up the incline face 150 of the notch and thus pass over the same.

The tubular portion 62 of the cast metal base 38 is provided with an outwardly extending boss 185 within which is screw threaded a housing 186. A latch pin 187, provided with a transverse stop pin 188 in its outer end, extends through this housing and is surrounded by a spiral spring 188 al iutting against the shoulder of the tapered end portion 189 of the pin and normally forces the same into engagement with one of the recesses 190 in the operating rod 61. The purpose of this structure is to automatically hold the operating rod 46 in the position to which it is brought, there being provided three notches corresponding to the raising, lowering, and neutral positions of the intermediate clutch member 65. As a means of automatically limiting the raising and lowering movements of the cross head I have provided a trip button 191 seated in a boss upon the side of the base portion of the nut 90, this trip member being adapted for engagement with the lower face of the yoke member 50 which, as will be apparent, extends downwardly while the operating handle is set for raising operation of the truck body. Then, when the operating handle 45 is set for lowering operation of the truck body, the yoke arm will extend somewhat upwardly and with my mechanism will be engaged by the downwardly extend- .ing pin 192 which is suitably mounted upon the cross head at 192 and extends through guides 192 on the cast member .15 to the inside of the same.

From the above it will be seen that with my device I am able to either raise or lower the truck body with the gears set for high, low or intermediate speed, but such operation is possible only during direct drive of the truck because of the one way clutch connection which makes it impossible to transmit motion from the motor to the nut and screw mechanism during reverse drive. It will also be. clear that the truck itself can be propelled forwardly or backwardly only when the hoisting niecluinisui is disconnected. from the dri .'e. shaft of the u'iotor.

it will be seen also that the sheaves maintain at all time. substantially the same relative hoisting position with respect to the points of attachment of the cables to the channel bars; which is made possible by the particular swinging movement of the sheaves through the curved path described by them. Thus the sheaves have paths of movement corresponding in a definite man nor with those of the points 8 and also with respect to the axis 6, while the cross head moves in a straight line. fhus an effective hoisting operation is had throughout substantially the entire extent of the cables, with the consequentincreased e'l'liciency.

Other advantages resulting from this invention will be apparent to those who are familiar with the art to which it relates.

hat I claim is:

1. In a dump truck, the coi'nbination of a chassis, a truck body mounted thereon and capable of raising and lowering movement, a cable having its ends secured to fixed parts of said chassis and truck body respectively, a sheave about which said cable extends, a support for said sheave, guide means for said sheave extending upwardly from the body end of said cable, and means for projecting said support bodily so as to move said sheave along said guide means.

2. In a dump truck, the con'ibination of a chassis, a truck body mounted thereon and capable of raising and lowering movement, a cable fastened at one end to the lower front portion of said truck body and at its other end to a fixed part of said chassis, a sheave about which said cable extends, a bodily movable support for said sheave, a channel on the end of said body for said sheave and extending below said body, and means for bodily moving said support so as to project said sheave along said channel.

3. In a dump truck, the combination of a chassis, a truck body mounted thereon and capable of raising and lowering movement, a cable having its ends'secured to said chase sis and truck body respectively, av sheave about which said cable extends, a support for said sheave, an operating arm pivoted to said support, means for projecting said operating arm so as to cause said sheave to maintain a position above the body end of said cable for hoisting operation throughout substantially the entire extent of said cable.

45. In a dump truck, the combination of a chassis, a truck body mounted thereon and capable of raising and lowering movement, cables attached to said chassis and truck body, a cross-head and dowmvardly extending arms attached thereto. upwardly extending arms pivoted to the lower ends of said first named arms and carrying sheaves at their upper ends for hoisting en 'agen'ient with said cables, and means for raising and lowering said cross-bead.

ln a dump truck, the ,'onibinat ion of a chassis, a truck body mounted thereon and capable of raising and lowering movement, a guide ay ]'n'ovided on the one wall of said truck body. a cable attached to iixcd parts of said chassis and truck body, a sheave engaging said cable and having riding engagement; in said guide way, and means for moving said sheave along said guide way for raising and lowering said truck bocy.

(3. in a dump truck, the combination of a i thereon and capable of raisingandlowering mfor raising andm iowering said trnclgbody, said means inclndlng ga 'pivotally mounted support for said ysheavel and a rodihaving body: and connected to. said sheave support;

. capable of raising. and lowering movement,

. body, cables agttachedto, Saidchassisand to bars, and. means forWmoving said 1 sheaves a along saidchannelbars for raising and lowering-said truck body.

. 8. In a dump truck, the com capable of raising and lowering 'III V H ybody, cables attachedtosaid chas is 1' nel bars, sheavesiengaging said cables and having riding engagement in said channel bars, and means formoving said sheaves along said channel bars and maintaining said sheaves in saidchannel bars for raising b and lowering said truck body. fl I I9. Ina dump truck, the combination of'a chassis, a hoisting Kmembe'r movablel sub stantially vertically in a fixed path, a. truck fixedpath, a cable secured'to theframe and ii a bight of the cable, anda support therefor. movably connected to. said operating and lifting devices and adapted to accommodate as the truck body is raised. i

.10;- A dump truck, (comprisingframe,

vertically thereoninwa fixed path, an ad.

anchoring means jthereon, a cable extending "I and an operating memberbetween said cable andgoperatingidevice and having portions [adapted to partakerespectivelyof substam tially the motions, of said body part and operating device, g (a b 11. A dump truck, comprisingia frame,

justablebody having a movable portion, a a cablefextending between said body and iiisiaeae ii t a s, ai trucltidaody.pivotallys mounted} movement, a; guide way providedjon the one "wall ofsaid truck body, a: cable ,attachedto,

satdchassis and truck body, awsheave engaging; said cableand having lfldling engagee.

1 mer tsald guldelwway, and means for movmg saidsheave along saidagnide way pivotal support on; theaxie of said truck 7. :In a dnmp truck, the .combination ofa a. chassis, truck jbOClY mounted thereon and channelbars on thejfront; end of; said truck thellower endsfofa fixed pa'rtof saicl chana,

incl bars, sheaves engagingsaid cablesiandv havnglJr dmg engagement ln sald channel bination of a chassis, atrncl: bodymounted"thereon and channelbarsontlie front endof said truck."

i the lowerends of a fixedpart of said. chain "fbody monnted on saidchassis. and having a Wpart movable in apath diverging'fromsaid to the said body, lifting. means engaging.

itself to diverging relative-movement thereof an operating device movablesubstantially j ustable body having. a portionmovingi in a pathfldiverging from saidfixed path, cable! afrOmsaid anchoring means to the frame,"

an operating device movablesubstantially verticallythereon ina fixed-path; an ad cable, and mjeas: connecting. said lifting de;-"

atter rises. a 2, A d mp truck, comprising a frame, an operat ng devicecable extending between. said body and fran qjfa. lifting .device inja bight of the latt rises, andugniding; means on the body for said l ftmgdevmeq' able having a movable portion, cable: ElI lCl lQLllIlg means depend ng from the body,

cable, means connecting said lifting device andoperatmg device and arranged to move sa d/l fting devicetoward the body as the 13. A dump truck, comprising a frame, an operat ngdevlce movable substantially verysthere'on 111, 2} fixed path, an,ad nst vice; and operlatingdewiceb and arrangedtof move saidlifting device toward the bodyas i I mov .fl ub en e ly v rtical y t re n fi d pa h, a .jnstabjlebody having-amovable portion, a; i

a cable extending between said anchoring. means andframe,-a. llftmg devlce in a bight of the cable, andmeans connecting said lifting1 device and: operating device and arranged tolniove saidlifting device toward the bodyas the latterrises. let, A dump truck,comprising a :tically thereon in a fixed path, an adjust-= able body havingamovable portion, cable fra1ne,an H o-peratingdevlce movable substantially veranchoring means depending from the body, a cable extending between said anchoring means and-frame, a lifting device inafbight of the cable, and means connecting said lifti gidevice and operating device and are ranged to move said lifting device' toward thebody as the latter raises, said. cable an said. lifting device as the body rises;

operating device movable substantially vere tically thereon in a fixed path, an adjustable bodyhaving a movable portion, a caajvertic-ally extending lifting device having bleextending between said body andQframe,

its upper portion in a b ight of'the cable,

said lifting device to saidoperating device and" arranged to IIlOVBSiLld llfting devlceto- -ward thebody as the latter rises.

vertically thereon in a fixed y path,an adcable -extending between said body and frame, a verticallyiextending lifting device jiistable body having a movable portion, a

choring-means beingalsoarrangedto guide 105 i 15. A dump truck,-comprisinga frame, an.

V and means connectingthe lowerportionof i 16, A'dump truck, comprising a frame, an. operating device movable substantially having its upper portion in abight ofthe cable, means connecting the lower portion of'saidlifting device to; said operating de-.

vicetoward the body as the latter rises, and

portion of'saidllifting device. 17. A dump truck, comprising a frame, an

means for controlling motion of the lower I vice andarranged to move said liftingde operating device movable substantially vertically thereon in a fixed path, an adjustable body having a movable portion, a cable extending between said body and frame, a vertically extending lifting device having its upper portion in a bight of the cable, means connecting the lower portion of said lifting device to said operating device and arranged to move said lifting device toward the body as the latter rises, and means extending from the frame to the lower portion of said lifting device for controlling the motion thereon.

18. A dump truck, comprising a frame, an operating device movable substantially vertically thereon in a fixed path, an adjustable body having; a movable portion, a cable extending between said body and frame, a vertically extending lifting device having its upper portion in a bight of the cable and its lower portion provided with horizontally separated pivots, and means connecting one of said pivots to said operating device, whereby said lifting device is held toward the body as the latter rises.

19. A dump truck, comprising a frame, an operating device movable substantially vertically thereon in a fixed path, an adjustable body having a movable portion, a cable extending between said body and frame, a vertically extending lifting device having its upper portion in a bight of the cable and its lower portion provided with horizontally separated pivots, means connecting one of said pivots to said operating device, whereby said lifting device is held toward the body as the latter rises, and means on the body for guiding the liftingdevice.

In testimony whereof I hereby afiix my signature.

PERCY E. BARKER. 

